Sepolia Gas Limit Triples Under Glamestead
Ethereum's "Glamestead" upgrade is now available on the Sepolia test network, pushing the network's processing limit to nearly 200 million Gas per block. This figure more than tripled from the previous cap of about 60 million, marking the first time that Ethereum's most significant Layer 1 expansionary changes in recent years have been tested for the public.
Early test blocks used 26% to 46% of the new capacity, and the sampled blocks consumed approximately 52 million to 92 million Gas. The six-minute voting cycle generated all predetermined blocks and directed 99.97% of eligible pledges towards finalization, providing an encouraging early signal of network stability under the expansion budget.
"Glamestead" consists of two parts: Gladius at the consensus level and Amsterdam at the execution level. Just 11 hours after the fork was activated, the Gas limit on Sepolia reached its target of 200 million. At the same time, the time it takes for Gath to process the same block has been shortened from approximately 115 milliseconds to approximately 30 milliseconds.
The upgrade also adjusts transaction processing and data access costs, changes that may require developers to re-test applications built based on specific Gas assumptions.
Hoodi Next, Mainnet Timeline Still Open
Before the official launch, the deployment of Sepolia was not completely smooth. Prysm, the Ethereum verifier client, has released an emergency update version 7.2.1 to automatically apply new Gas restrictions for new verifiers. Older versions that are not manually reconfigured will default to the original 60 million limit, which may corrupt test results.
As the Sepolia test unfolds, our eyes turn to Hoodi, the next public test network in the sequence. Its activation is tentatively scheduled for October 27, depending on Sepolia's results. The Ethereum main network has not confirmed the activation date and has not set final production environment Gas limits. The Sepolia fork itself has been postponed from an earlier August date.
The difference between a test network and a main network is crucial. The higher Gas limit on Sepolia suggests that developers are stress testing capacity and looking for bottlenecks, rather than that the main network is ready to adopt the same limit. Larger blocks will increase computing requirements for nodes and validators, and developers will use data from Sepolia and Hoodi to determine which parameters are safe for production environments.

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